code: def add_package_name(self, package_name):
      self.add_code_line(f"package {package_name};")
  
file_path: m2cgen/m2cgen/interpreters/java/code_generator.py
imports: from contextlib import contextmanager
  from m2cgen.interpreters.code_generator import CLikeCodeGenerator
label_desc: Use image node_id 3 for calling the JavaCodeGenerator obj's underlying member method code with example usage: obj.add_package_name(package_name) without return types